PAM8403 Micro digital amplifier board 2 * 3W Class D digital power amplifier module 2.5 ~ 5V USB power supply

Features

• Dual channel stereo output 3 w + 3 w power Class D
• Works with 2.5V-5v power supply
• High amplification efficiency 85%
• can directly drive 4 Ω/8 Ω small speakers
• Good sound quality  & noise suppression
• Unique without LC filter class D digital power board
• Can use computer USB power supply directly
• Small Size, 1.85 x 2.11 cm   can easily fit in a variety of products

Note when using

• Input audio should be via sheilded wire for best performance.
• Use proper filtered power supply with good filter capacitors.
• Take care not to short speaker wires else IC will get damaged.
• Make sure power supply never execeds 5.5V else IC will get damaged. Use regulated power supply.

Board Schematic